Rock-drill.



W. A. SMITH.

ROCK DRILL! APPLICATION 1115011111119. 1917.

Patented Feb; 4, 1919.

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ROCK DRILL.

APPLICATION FIED MAR. I9. IBI?.

Patented Feb. 4, 1919.

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UNITED STATES PATENT OFFICE.

WILLIAM A. SMITH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL YI MANUE'ACTURING' CO., OF DENVER, COLORADO, A CORPORATION OF DELAWARE.

ROCK-DRILL.

Application filed March 19, 1917.

' ful `Improvements in Rock-Drills, of which the following is a specification.

The present invention relates to drilling apparatus and'more particularly to that type vin which the chuck and therefore the tool is rotated by means independent of the motor which delivers the drilling blow.

One of the objects of the p resent invention is to provide a relatively simple and practical structure that is also compact, and in whichthe various parts will eiectively carry ll out their functions.

In the drawings a Figure l is a plan view of the preferred embodiment of the invention, portions being shown in horizontal section,

Fig. 2 is a vertical longitudinal sectional view therethrough.

Fig. 3 is a front elevation,

Fig. 4 is a view in section taken on the line 11e-l of Fig. 2,

Fig. 5 is a detail cross sectional view on the line of Fig.

Fig. 6 is a horizont-al sectional view through the rotary motor and gear case.

' F ig. 7 is a fragmentary longitudinal section Ythrough a' portion of the .struct-ure shown in Fig. 5.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, a suitable support 6 is employed, having the usual longitudinal guideways 7 in which is slid- Mounted upon the carriage orcradle is the` drilling mechanism proper. The same consists of a cylinder'v member ivit'hin which reciprocates a hammer piston 13. The cyl- Specification of Letters Patent.

Patented Feb. 4, 1919.

Serial No. 155,830.

inder member has a removable rear head 1l and a reduced head 15 which is preferably integral with the barrel of said cylinder forming` an integral shoulder 16. The rear head 1l is provided with opposite semiconical projections 17 that are disposed above the projections 10. Upon the carriage and engaged with said projections 10 and 17, are clamping washers 18 having conical sockets 19 that receive the projections 10 and 1T. A bolt opening formed between the carriage and rear head 14 receives a bolt 2O that serves to bind the parts in associated re; lation and thus clamp the rear' end of the drilling motor to the carriage.

The hammer piston 13 is of the reversible type, comprising a central head 21 having oppositely extending necks 22 of similar.

ton hammer is provided with a longitudinal bore 25 that is of the same diameter throughout .its length and permits the passage therethrough of a liquid delivery tube 26 mounted in the rear head 1i and having a reduced extension, 27 located in the front portion of the piston and preferably projecting beyond the same. This tube is for the purpose of delivering cleansing liquid into the drill bit, as will be readily understood. and the parts are so arranged that it will not interfere with the reversal of the piston hammer. Y

`Mounted on the upper side of the drill actuating motor above described, is a drill rotating motor, the same consisting of a cyllower side ot' this collar is provided with outstanding liat sided tapered projections 30 disposed over the projections 11, as shown in Fig. f1, the sets of projections being clamped together by plates 31 having tapered sockets that receive the saine, these plates bridging the joint between the carriage 8 and collar and being held in assembled relation by the tie bolt `By having one. set, as for eX- ample, the rear projections 10 and 17 conical andthe front set with flat faces, it will be obvious -thatwhile the parts are securely clamped together, the flat faces will permit any relative di'erence in the relation f the 5 parts and obviate strains that might arise if both sets of securing projections were-con'iv cal and the sections thereofgwere slightly out of position.

The cylinder member 28 contains a rotary, motor, preferably ofwell-known type, and consisting of a pair of pistons 33 and34, having 'intermeshing teeth.v vO e ,of these pistons, as 33, is Iprovided with a suitable roller bearing-35, the other .carrying a shaft 36 that projects through the front wall 37 of the cylinder 28, said wallfbeing preferably removable.- 0n the-projecting end of this.`

shaft is located a pinlon 38.

Mounted on the front end of the drill ac tuating motor is a rotatable chuckwhich includes a casing 39 oontainin a rotatable tool receiving memlber 40 having a suitable socket 41 in which the rear end of the tool 42 is engaged, so that it is readily removable, but willlbe rotatedthereb he member 40 -is ,ixedly' Alocated wit in an outer sleeve 43, beingconnected to said sleeve b any suitable means, as for example, a-threa v ed engagement 44, and the sleeve 43 is ro- 30 tatalble within the casing`39'. This sleeve is provided at its rearend with an integral.

The front head '37 of the motor cylinder 28 is provided with a forwardly projecting wall`46, and the rear end of the casing 39 -is enlarged, as shown at `47 and abuts against the front edge of said wall, thereby producing a gear case, in which the driving pinion 38 and the gear 45 are located. The pinion 38 is in mesh with a gear 48 located alongside the same, and this gear 48 -is integral with or fixed to a pinion 49 that in turn meshes with the lgear 45.- It will thus be seen that a reducing train of gearing is provided between the rotarymotor and the tool-receiving chuck for transmitting .motion from the former to the latter.

The head 37 of the rotary motor cylinder member 28 is secured to said cylinder member by bolts 50, shown in Fig. 1, andthe chuck casing 39 is clamped to the rotary motor and the latter in turn is clamped in position upon the front end of the cylinder' member 12 by side bolts 51 engaged at their rear ends in ears 52 formed upon the rear head 14, and in ears 53 formed upon the said chuck casing 39. Springs 54 are preferably located on these bolts to take care of the usual vilbration and jars incident to the operation of the apparatus.`

For the purpose of delivering and controlling the supply of motive fluid to the mechanisms, the' following instrumentalities are y preferably employed.. Formed upon the up,-4 v

y- VIt' is believed that the operation of the 130 e5 ,persidepf' the barrelgfthe cylinder mehr` .out of communication with a passageway 68 yrotatable throttle' vvalve 59 having an exposed actuatinghandle 60. This throttle valve is provided with a lateral port 61 that ismovable into and out of communication with passageways 62 and 63that communicate with the chambers 24 for supplying motive'lui'd to the drill actuatin motor, and thuseectthe reciprocation o the hammer piston 13. It is believed to be unnecessary to enter into a detailed description of the operation of this, hammer piston.

A branch passageway 64 leads from the valve casing '56 between the inner end of the throttle valve 59 and the nipple 58 and `is in communication with one end of the other casing 57 In this valve casing is located a throttle valve 65 operalble independentl of the valve 59 by an ex osed actuating evice 66 that is located, oweve,

. adjacent to the actuating handle 60 of thevalve 59, So that bothare lreadily accessible toan operator. The valve 65 has Aa lateral port 67 therein, which is movable into and that leads to the rota motor 28. A suitable packing 69 is re erably interposed between the rear wal of the motor cylinder and the adjacent end of the enlargement 55. The exhaust from said rotary motor takes l place throu h a port 70 formed in the'fro'nt heads 37 of e rotary' motor cylinder, which thus admits such exhaust into the gear casing. The said gear casing is in turn pro- A, vided in its lower side with an outlet port 71 106 opening into a passageway 72 that leads to the atmosphere. V

` The portion of the enlargement 55 between the two valve casings 56 aiid 57 is i hollowed out to produce a lubricant reserf voir 73, to which Aaccess can be 'Igained by means of a removable plug 74. his reservoir has outlet orts 75 and 76 in its ends, with which poc ets 77 respectively formed in the valves 59 and 65 are arranged to com- 115 municate. The pockets also move into and out of communication with channels 78 that open respectively into the passageways 63 and 68. Consequently it will be evident that when the valves are turned to one position, the pockets 77 will fill with lulbricant and when they are turned to their other positions, the pockets being brought into communication' with the channel 78, the lubricant will flow'therefrom and thus be delivered '125 .into the passageways. When so delivered the lubricant will be carried by the motive fluid through the working parts ofthe apiaratus.

mechanism will be readily \understood. lVlien motive fluid is admitted to the drill actuating motor by turning the throttle valve 59 in the proper direction, the hammer piston will be reciprocated and operates upon the rear end of the drill bit 4t2. In like manner When the throttle valve 65 is turned to bring the port 67 into` communication with the passageway 68, the rotary motor will lbe operated, thereby rotating the chuck and the drill bit engaged therein.

. Either motor can be actuated independently of the other, the parts are relativelyy simple, and all are readily accessible.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in t-he art, Without further description, and it will be under stood that various changes in the size, shape, proportion and minor details of construc-` tion may be resorted to Without departing from the spirit or scope of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a cylinder member and a hammer iston operating in the cylinder member, of) a collar surrounding and mounted on the cylinder member, a rotary drill receiving chuck at the front portion of the cylinder member, and a drill rotat-ing motor connected to the collar and geared t0 the chuck.

2. In apparatus of the character set forth, the combination with a cylinder member having a reduced headportion, and a hammer piston having its hammer end operating in said head portion,` of a collar surrounding said head portion, a rotatable drill receiving chuck in said head portion, and a drill rotating motor mounted on the collar and geared to the chuck.

3. In apparatus of the character set forth,- the combination with a drill actuating motor including a cylinder member, of a chuck rotating motor removably mounted thereon and -abutted against a portion thereof, a chuck including a rotatable tool receiving member and a casing therefor, the latter being abutted` against thechuck rotating motor and separable therefrom, and means for clamping together the drill actuating motor, the chuck rot-ating motor and the chuck casing.

et. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member having a reduced head, forming an external shoulder,

arable therefrom, and side bolts for clamp- 5. In apparatus of the character set forth,

the combination with a drill actuatiiw in otor including a cylinder member having a reduced head and a hammer piston operating in the cylinder member. of'a rotary motor including a cylinder member having a collar surrounding the head, a rotatable chuck including a tool receiving member and a casing therefor, the latter being disposed in advance of the rotary motor. a gear case formed between the rotary motor and chuck, gearing for transmitting motion from the rotary motor to the tool receiving member, and means for securing the parts together.

6. In apparatus of the character set forth, the combination with a drill actuating motor including a c vlinder member. of a rotatable chuck, a chuck rotating motor carried by the drill actuating motor c vlinder member, motive fluid supply means including a common `chamber on the c vliiider member and separate passageways formed in the Walls of the cylinder member and leading from the chamber to the tivo motors respectively, and independently manually operable throttle valves located side b v side in one side of said cylinder member for respectively controlling the passages. to permit either motor to be operated independn ently of the other.

7. In apparatus of the character set forth, the combination with a drill actuating motor including a cylinder member, of a rotatable chuck. a chuck rotating motor carried by the drill actuating motor cylinder member, motive'fiuid supply means including a common chamber on the cylinder member and separate passagevvays leading from the chamber to the tvvo motors respectively. transversely disposed valve casings located side by side at one side of the cylinder meinber and including respectively the passage- Ways. and rotary valves in the casings. respectively controlling the passages to permit either motor to be operated independently of the other. said valves having adjacent actuatingmeans at corresponding ends.

S. In apparatus ot the cha rai-ter set forth, the combination with a drill actuating n1otor including a cylinder member. ot a rotatable chuck. a. chuck rotating motor carried by the drill actuatingr motor cylinder member. motive Huid supply means conn niunicating ivith both motors. spaced valve casings. a lubricant reservoir between the casings communicating tlicrc\\^itl1.=,|ml valves in said casings respectivelv controlling thc supply of motive Huid to the motors and the delivery of lubricant fromv tbc rcscrvnr to said motors.

l9. In apparatus of the character set forth, the combination of a drill actuatin tor, of a drill rotating motor, a drill r'eceiving chuck, gearing between the rotating motor and chuck, a casing inclosing the gearing, means 'for supplying motive fluid to the motor, means for delivering the exhaust from one of the motors to-the gear casing, and means for delivering lubricant to the motive fluid supply.

10. In apparatus of the character se forth, the combination with a drill actuating motor including a barrel, of a drill rotating motor mounted on the barrel, means in rear of the drill rotating motor for de# livering motive fluid thereto, means for introducing lubricant to the motive fluid supf ply, a rotary drill receiving chuck, gearing In advance of the rotating motor and connecting the same with the drill ,receivin chuck, a casing inclosing 'a gearing, an,v

means for delivering the exhaust-from the f rotating motor into the gear casmg.

In testimony whereof, I affix my signature in the presence of two witnesses.

WILLIAM A, SMITH.

Witnesses:

D. W. RoDoLr, R. G. DAVIS. 

